Journal ArticleDOI
High figure of merit in partially filled ytterbium skutterudite materials
TLDR
In this article, a polycrystalline skutterudite partially filled with ytterbium ions was shown to have a relatively high dimensionless figure of merit (ZT) in the presence of Yb atoms.Abstract:
We present evidence of a relatively high dimensionless figure of merit (ZT) in a polycrystalline skutterudite partially filled with ytterbium ions. The small-diameter yet heavy-mass Yb atoms partially filling the voids of the host CoSb3 system exhibit low values of thermal conductivity while the quite favorable electronic properties are not substantially perturbed by the addition of Yb. This combination is ideal for thermoelectric applications exemplifying the “phonon-glass electron-crystal” concept of a thermoelectric material, resulting in ZT=0.3 at room temperature and ZT∼1 at 600 K for Yb0.19Co4Sb12.read more
Citations
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New and Old Concepts in Thermoelectric Materials
TL;DR: The most promising bulk materials with emphasis on results from the last decade are described and the new opportunities for enhanced performance bulk nanostructured composite materials are examined and a look into the not so distant future is attempted.
Journal ArticleDOI
Multiple-filled skutterudites: high thermoelectric figure of merit through separately optimizing electrical and thermal transports.
Xun Shi,Xun Shi,Jiong Yang,James R. Salvador,Miaofang Chi,Jung Y. Cho,Hsin Wang,Shengqiang Bai,Jihui Yang,Wenqing Zhang,Lidong Chen +10 more
TL;DR: The results firmly show that high power factors can be realized by adjusting the total filling fraction of fillers with different charge states to reach the optimum carrier density, and lattice thermal conductivity can also be significantly reduced, to values near the glass limit of these materials.
Journal ArticleDOI
Compromise and Synergy in High-Efficiency Thermoelectric Materials.
TL;DR: Novel concepts and paradigms are described here that have emerged, targeting superior TE materials and higher TE performance, including band convergence, "phonon-glass electron-crystal", multiscale phonon scattering, resonant states, anharmonicity, etc.
Journal ArticleDOI
Enhancement of Thermoelectric Figure-of-Merit by a Bulk Nanostructuring Approach
TL;DR: In this paper, the synthesis process and the relationship between the microstructures and the thermoelectric properties of the nanostructured bulk materials with an enhanced ZT value are reviewed.
Journal ArticleDOI
Nanostructured thermoelectric materials: current research and future challenge
TL;DR: The field of thermoelectrics has long been recognized as a potentially transformative power generation technology and the field is now growing steadily due to their ability to convert heat directly into electricity and to develop cost effective, pollution-free forms of energy conversion.
References
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Journal ArticleDOI
SKUTTERUDITES : A phonon-glass-electron crystal approach to advanced thermoelectric energy conversion applications
TL;DR: In this paper, the authors proposed a method to compare one potential thermoelectric material with another, based on a numerical expression that is commonly used to compare the performance or efficiency of a particular device made from a material.
Journal ArticleDOI
Effect of partial void filling on the lattice thermal conductivity of skutterudites
TL;DR: Seebeck et al. as discussed by the authors measured the impact of partial void filling on the lattice thermal conductivity of polycrystalline antimonides with the skutterudite crystal structure with La partially filling the voids.
Journal ArticleDOI
Some properties of semiconducting IrSb3
Glen A. Slack,V. G. Tsoukala +1 more
TL;DR: In this article, a number of properties such as thermal expansion coefficient, sound velocity, thermal conductivity, electrical conductivity and Seebeck coefficient have been measured by hot isostatic pressing of powders.
Journal ArticleDOI
The effect of rare‐earth filling on the lattice thermal conductivity of skutterudites
TL;DR: In this paper, the lattice thermal conductivity of these filled skutterudites is quantified in an effort to quantify the impact of void filling in this structure, which shows that the atoms "rattle" in the voids of the structure and therefore interact with a broad spectrum of lattice phonons, reducing their mean free paths substantially below that in the "unfilled" skutteruds.
Journal ArticleDOI
Cerium filling and doping of cobalt triantimonide
TL;DR: In this article, the structural, magnetic, and transport properties of filled skutterudites of the form Ce{sub y}Fe{sub 4{minus}x}Co{sub x}Sb{sub 12} with 0{lt y{lt}1 and x=3.25 and 4.25, respectively, were studied.